Daylight developing tank for roll films



,Aug. 17,1926. 1,596,779

H. J. J. VAN DEN BOOGAARDT ET AL DAYLIGHT DEVELOPING TANK FOR ROLL FILMS Original Filed Jan, 1921 2 Sheets-Sheet 1 'J wrm H.J.J Van den Boogaamtt Aug. 17 192s. 1,596,779

H. J. J. VAN DEN BOOGAARDT ET AL DAYLIGHT DEVELOPING TANK FOR ROLL FILMS Original Filed Jan.' 1921 2 Sheets-Sheet 2 Patented Aug. 17, 1926.

UNITED STATES PATENT OFFICE.

HENDRTCUS JACOBUS JOHANNES VAN DEN BOOGAARDT AND LEENDEBT JOHANNES FBANCISKUSHAGG, OF THE HAGUE, NETHERLANDS; SAID HAGG ASSIGNOR TO sen) vu mm BOOGAABDT.

DAYLIGE T DEVELOPING TANK FOB. ROLL FILMS.

Application filed January 29, 1921, Serial 1T0. 440,898, and in the Netherlands November 8, 1920. Re-

newed April 12, 1926.

The present invention relatsto a daylight developing tank for roll films of the type, in

which the film is unrolled and spread internally of a casing impervious to light by the aid of -a mechanism operative from outside A further object of the invention is to' provide means for washing and fixing the film' without removing the same from the casing.

These and further objects, together with the construction and combination of parts will be more full described hereinafter and particularly set orth in the claims.

Referring to the drawings, in which similar numerals indicate the same parts throughout the several views and in which a mode of execution of the present invention is illustrated, Fig. 1 is a 'sideview and Fig. 2 a vertical section of the apparatus. Fig. 3 shows a bottom view of the cover. Fig. 4 shows a plan view with the cover removed. Fig. 5 shows a side view of the opened driver. Fig. 6 shows a section on the line of Fig. 5. a Fig. 7 shows a front view of the spool-house. Fig. 8 shows a section on the line 88 of Fig. 7.

The casing (Figs. 1, 2 and 4') consists of a circular wall provided with springs 21 v for pressing the cover 48 upon the top of .same, and provided with a stop 22 for preventing the rotation of a separate, perforated and changeable bottom-plate 23 carrying the spiral guide-wall 24. Said guidewall 24 is provided at its inner end with a guide-roller 25 and adjacent thereto with 'fgrooved guides 26. Further guide-rollers.

'27 are distributed over the whole length of the outer surface of the spiral guide-wall 24.

"'- "Thecasing further consists of a bottom- -':'.p1ate:28 ;in clining to the centre and provided "at tlie lowest point with an outlet-pipe 29 closablev by a cock 51, whilst somewhat higher a second outlet-pipe 30 is arranged, which is closable by a cock 52 and possesses a vertical part 53.

The cover consists of an upwardly directed conical or funnel-shaped part 33, provided at the bottom with two concentrical rings 31 and 32, for taking up the circular upper edge of the wall 20 of the casing, and closed at the top by the inner and downwardly directed conical part 34, which leaves at the,

bottom an opening 35.

Said opening 35 is closed by a plate 37 in such a manner that there remains a narrow slotl36 between the bottom-edge of the conical part 34 and theplate 37.

The plate 37 is joined to the outer conical part, 33 in such a manner that there remains a narrow slot 38 between the outer circumference of said plate 37 and said part 33.

Under the plate 37 a rod 40 is joined .to the outer conical art 33 and at this rod 40 a late 41 is sli ably and rotatably suspended y means of eyes 39, the rotation of said plate 41 being limited by means of a stop-- the bottom-plate of thecasing, and of such thickness that it may easily be passed through the eyes 9 of the driver, when the same is in closed state.

By the action of a spring 49 an arm 44,

rotatably mounted in the cover, presses on the plate 41 and pushes said plate in such osition, that the pin 42 is moved away as air as possible from the centre of the cover. The driver consists of two plates 1 and 2 hingedly connected to each other in such a manner that when the driver is open and the plates 1 and 2 are lying one adjacent to the ,other, there remains between the front side of plate 1 and the back side or plate 2 a slot 3 of sufiicient width for allowlng the end of the film or of the duplex-paper provided at the back of same or of both to be easily passedthrough said slot and to cover the rear end of the latel. For connecting the driver to the fi m the plate 2 is provided with pins 4, which in the closed position of the driver penetrate through the end of the film, through the end of the duplex paper or through both, covering the rear end of plate 1 and catch into openings 5 provided in said plate 1. Further the plate 1 is provided with eyes 9 projecting in the closed position of the driver through the plate 2.

The spool-house consists of a curved wall 11, the extreme ends of which extend res ectively beyond a bottom-plate 12 provided with an opening 13 for receiving the lower stud 47 of the spool 45 and beyond a topplate 14 provided with a recess 15 for receiving the upper stud 46 of the spool 45, said stud 46 being locked in said recess 15 by means of a plate-spring 16 arranged on the top-plate'14 and provided with an opening 17 (Fig. 4) for receiving said upper stud 4 of the spool 45.

'For removing the spool-house from the casing the top-plate 14 is provided with a knob 18 for preventing the film from unrolling itself, when placed in a rolled-up state in the spool-house, a plate spring 19 is arranged inside of the bent-wall 11. I

The apparatus according to the present invention and consisting of the component parts described here before is used in the following manner:

A spool of exposed roll films is placed in the spool-house and the driver is connected either to the free end of the film, or to the free end of the duplex-paper, the free end of the film being glued on said duplexpaper', or is connected to both of them.

Now the closed driver and the spool-house are placed in the casing, the spool-house being placed between the guides 26 and the extreme ends of the curved wall 11 extending beyond of the bottom-plate 12 and the top-plate .14 and lying in the grooves of the guides 26 and preventing thereby a displacement of the spool-house in the casing.

Next the pin 42 is passed through the eyes 9 of the driver, and the cover, resting upon the upper edge of the circular wall 20 of the casing, is moved over said upper edge in such a manner that the driver is pressed in the spiral wall 24 but does not glide along the same until the circular wall 20 of the casing lies between the two rings 31 and 32 of the cover and the springs 21 engage the cover, thereby closing the easmg.

By this movement of the cover the pin 42 is pressed towards the centre of the cover and the spring acting on the arm 44 is put under tension.

After having shut ofi the outlet-pipes 29 and 30 the cover is turned on the casing, and as soon as a'further rotat-ion'of the plate 41 is prevented by the stop-arm 43, the

driver is taken along and the film is rolled ofi' and stretched. During the rolling off of the film the duplex-paper glides at first over the guide roller 25 and subsequently 'over the guide-rollers 27.'

After the film has been stretched the developing liquid is poured through the funnelshaped part 34 of the cover, flows through the slot 36, over the plate 37, through the slot 38 and into the casing, filling the same gradually and directly acting on the whole and stretched film. I

As soon as the film is developed, the outlet-pipe 29 is opened and the developing liquid is let off. Then the washing-out li uid, for example water, ispoured throug the funnel-shaped part 34 of the cover into the casing and let off either by the outlet-pipe 29 or by the outlet-pipe 30, said liquid on its way through. the casing wash-.

ing the film and taking along the rest of the developing liquid.

The washing having been achieved, the outlet-pipe used is closed and the casing is filled with the fixing liquid which after the fixing flows away through the outlet-pipe 29. After closing said outlet-pipe and after opening the outlet-pipe 30, the rinsing liquid is admitted to the casing. In consequence of the special shape of the outlet-pipe 30 the rinsing liquid will be almost at rest near the bottom of the casing and the precipitate separated from 'the fixing liquid will not be agitated but will sink to the bottom 28, so that it may beremoved afterwards. Moreover the casing can never be drained during the rinsing even if the water supply might be stopped-unawares.

After the rinsing the casing is opened and the film is removed. After having been dried the same is ready for making photographic copies.

Having thus described our invention, what we claim and desire to protect by Letters Patent is:

1. An apparatus for the manufacture of negatives in daylight comprising, a casing, a spool house, adapted to be rotatably connected to said casing near the centre thereof, guide-rollers arranged within said casing in such a manner as to form together a spiral guide way, a driver and a lid provided with a pin extending into the casing and through the eyes of said driver.

2. An apparatus for the manufacture of negatives in daylight comprising, a casing, a removable perforated bottom plate, a spiral guide wall carried thereby and provided with guide rollers distributed over the whole length thereof, means for connecting. the spool-house to the spiral guidewall near the centre thereof, a driver and a lid provided with a pin extending into the casing and through the eyes of said driver.

3. An apparatus for the manufacture of negatives in daylight comprising, a casing,

and connected to the a spool-house, a spiral-wall within said casing and provided near the centre with guides for securing the aforesaid spool-house, a'

lid for said casing, a driver, a pin slidably mounted in said lid and passing through the eyes of said driver, means for moving said pin to press said driver toward said spiral-wall, and guide-rollers arranged along said spiral-wall. I

4. An apparatus for the manufacture of negatives in daylight comprising, a casing having a bottom inclined from the edge toward the centre with a closable outletpipe leading from the lowest point and opening below the lowest point thereof, and" negatives in daylightcomprising, a casing,

a cover therefor comprising an upwardly directed conical part having two lower concentric rings, a downwardly directed funnel seated in said conical part and a plate within said conical part and slightly spaced from the lower end of said funnel, said plate being so disposed as to. leave a narrow annularspace between'it andsaid conical part.

6. An apparatus for the-manufacture of negatives in daylight comprising, a'casing, a cover comprising two hollow frusto-conical members, one within and supported by the other, a late within one member and spaced from 0th, a rod beneath said plate uter frusto-conical member, a 'plate""rota ably and slidably mounted on said rod and carrying a pin,

. -a driver provided with eyes to receive said curing the film pin, a spring actuated arm forcing said late outwardly from the centre, and means or limiting the rotation of said plate.

, 7 In combination with an apparatus for the manufacture ofnegatives in daylight, a driver comprising two lates pivotally connected in spaced relation, resilient means for fastening said plates in closed relation, and cooperating in-a'nd-hole means for seetween said plates.

combination with an apparatus for manufacturing negatives in daylight, a spool house com rising a longitudinal curved wall and .en plates within the same, each plate being provided with a perforation to receive a spool stud, a plate spring I adapted to lock one spool stud in place, and

a spring within said spool house, between the end plates thereof 'and ada ted to act upon a film to prevent accidenta release of said film.

Apparatus for developing or fixing tainer, a guide member for holding .spiral 'roll and pull the same through sa1dsp1ral roll films comprising a container, a cover for said container, means for supporting a film roll within said container, a guide member for guiding the portions of the film when'unrolled, movable means for connecting with the free end of the film through said guide member and means forconnecting said cover with said movable means whereby upon movement of said cover relative to the body of the container, said movable means is actuated.

10. Apparatus for developing or fixing roll films comprising a container, a cover therefor, means for closin said cover on said container while aflor ing rotation to said cover relative to said container, means for supporting a film roll within said conthe film when unrolled in mutually separated portions and movable means for connecting with the free end of the film for movement of the free end of the film through said guide member.

11. Apparatus for developing or fixing roll films comprising a container, acover therefor, means for closing said cover on said container whileafi'ording rotation of said cover relative to said container, means for supporting afilm roll within said container, a guide member having a spiral passage for holding the unwound film in mutually separated portions and movable means for connecting withthe free end of the film for movement of the free end of the film through said guide member.

12. Apparatus for developing or fixing roll films comprising a container, a support for a film roll therein, a member for holding the free end of the film, a guide member having a curvedly extending passage, means for guiding said holding member, a cover for the container, means for rotating said cover while retaining said cover in light-proof relation with said container.

13. The combination of a coptainer o curved cross-section, a cover therefor, of substantially similarly curved cross-section, a guide member having an opening for the reception of a roll-film *in rolled condition and further comprising spirally arranged guide walls providing a spiral passage communicating with said opening, an arm for holding the free end of a roll film andmeans operative from the exterior of said casing for moving said-arm through said passage, to thereby unroll said film passage. a

14. The combination of a container of curved cross-section, a cover therefor, of substantially similarly curved cross-section, a guide member having an opening for the reception of a roll-film in rolled condition and further com rising spirally arranged guide walls provi ing a spiral passage communicating with said opening, an arm for comprising spirally arranged convolutions holding the free end of a roll film and lightprovidin a spiral passage communicating excluding fluid inlet means for said con with sai opening, an arm for holding the tainer. free end of a roll film and light excluding 5 15. The combination of a container of fluid inlet means for said container. 1 substantially symmetrical cross-section, a In testimony whereof, we have signed our cover therefor of substantially similarly names to this specification. v symmetrical cross-section, a guide member HENDRICUS JACOBUS JOHANNES having an opening for the reception of a BOOGMRDT- 10 roll film in rolled condition and further U'IENDERT JOHANNES FRANCISKUS 

